Visual measuring device and visual measuring method for coordinates of surface of target based on round light spot marks

The invention provides a visual measuring device and a visual measuring method for coordinates of a surface of a target based on round light spot marks, and relates to the field of machine visual measurement. Shortcomings that during measurement of coordinates of the surface of the conventional large structure, manual intervention in a calibration process is high, efficiency is low, characters of a measured surface are also changed possibly, and the like are overcome. The visual measuring device comprises two visual image sensors, a visual image acquirer, a projector and a circular spot array target, wherein an image lens of the projector faces the surface of an object to be measured; image acquiring lenses of the two visual image sensors face the circular spot array target or the surface of the object to be measured; image data output ends of the visual image sensors are respectively connected with two image data input ends of the visual image acquirer in a one-to-one correspondence manner; and an image data output end of the visual image acquirer is connected with an image data input end of a remote control center. The visual measuring device and the visual measuring method can be widely used for visual measurement of coordinates of a low-frequency fluctuated surface of a large-size structure.